Stem winding watch



(No Mbdel.) 2 Sheets-Sheet -1 G. E. HART.

"STEM WINDING WATGH.

Patented May 31., 1887.

m y m M 5 m m My (No Mddel.) 2 Sheets-Sheet 2.

G. E. HART.

STEM WINDING WATCH No. 364,106. Patented May 31,1887.

UNITED STATES PATENT OFFICE.

GEORGE E. I-IAET, OF WATERBURY, CONNECTICUT, ASSIGNOR To THE WATEEEUEY WATCH COMPANY, OF sAME PLACE.

.. STEM-WINDING WATCH.

SPECIFICATION forming part of Letters Patent No. 364,106, dated. May 31, 1887.

Application filed December 23, 1885. Serial No. 186,560.

To all whom it may concern/.

Be it known that I, GEORGE E. HART, of Waterbury, in the county of New Haven, and in the State of Connecticut, have invented certain new and useful Improvements in Stem Winding Watches; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which- Figure l is an enlarged perspective view of the stem-arbor, setting pinion, winding-pinion, arbor-spring, and crown separated from each other and from the case-stem. Fig. 2 is alike view of said parts united. plan view from the rear of aWatch-movement and case containing said winding and setting mechanism, the back plate being removed and the stem arbor and its connecting parts occupying their normal positions. Fig. 4 is a plan View of said watch from the front, the dial being removed and the stem and its connecting parts shown in longitudinal section; and Fig. 5 is a like View of the same with the stem-arbor and its connecting. parts in engagement with the dial-wheels.

Letters of like name and kind refer to like parts in each of the figures.

My invention relates to the winding and setting of watches; and it consists in the means employed for winding the mainspring through the stem-arbor, substantially .as and for the purpose hereinafter specified.

It consists, further, in the means employed for connecting the stem-arbor with the Winding-pinion, substantially as and for the purpose hereinafter shown.

In the annexed drawings, A represents the pillow-plate, and B the back plate, of a watch, between which is placed any usual form of time-train'that has an ordinary mainspringarbor, O, which arbor carries upon one end a winding-wheel, D, that meshes with a second or intermediate wheel, E.

J ournaled within the case-stem f is a stemarbor, G, which has secured to its outer end the usual crown, g, and upon its inner end, which extends just through the case-center F, has secured a small pinion, H. Upon said arbor, immediately in rear of said pinion, is

journaled a second larger pinion, l, which has within the central portion of its inner face a Fig. 3 1s a (No model.)

slight recess, 45, and within the same has a C- shaped spring, i, that is secured at one end to said pinion and at its opposite free end is turned slightly outward into position to engage with the teeth of said pinion H. v

A spiral spring, K, placed around the stemarborG between the crown g and the inner end of the recessed portion of the stem f, operates to hold said arbor at the outer limit of its motion with the contiguous faces of the pinions H and I incont-act and the outer face of the latter in contact with the inner face of the casecenter F, such being the normal positions of said parts, but allows said arbor to be moved longitudinally'inward acertain predetermined distance, for reasons hereinafter set forth.

The pinion I is in engagement with the intermediate Wheel, E, and is caused to rotate the same, the wheel D, and the mainspringarbor 0 whenever the stemarbor G is rotated in such direction as to cause the springpawl z" to be engaged by the teeth of the pinion H, while when said stem arbor is rotated in the opposite direction said pawl will not be engaged and said pinion I and its connecting parts will remain at rest. The pinion H is adapted to engage with one of the dial-wheels, L, whenever the spring-arbor G is moved inward a sufficient distance, as shown by Fig. 5, at which time said stem by the separation of said pinion from engagement with the spring pawl t" is disconnected from said winding-pinion and free to rotate in either direction within the latter.

By this construction the spiral spring K performs no other office than to hold the stemarbor G at the outer limit of its motion, and may have any amount of stiffness necessary for such purpose Without interference with the ratchet mechanism, while the spring-pawl a" may be made as light as desired within the limits of the required longitudinal rigidity, and adds but slightly to the resistance offeredv to the rotation of said arbor.

Having thus described my invention, what I claim is- 1. As a means for winding the mainspring of a watch, a pinion secured to the inner end of the stem-arbor, a second pinion journaled upon said arbor in rear of the fixed pinion, and provided with apawl or tooth which is adapted ICO to be engaged by the teeth of said fixed pinion and thereby cause the motion ofsaid stemarbor to be transmitted to the mainspringarbor, substantially as and for the purpose shown.

2. As a means for winding the mainspring of a watch, a pinion secured to the inner end of a stem -arbor, a second pinion journaled upon said arbor in rear of the fixed pinion, and provided with a spring-pawl which is adapted to be engaged by said fixed pinion and is adapted to transmit the motion of the same to the mainspring-arbor substantially as and for the purpose specified.

3. As a means for connecting, the fixed pinion ofthe stem-arbor with the pinion journaled upon said arbor, a pawl or tooth which projeci's from the face of one of said pinions, and

have hereunto set my hand this 6th day of No- 30 vember, A. D. 1885.

GEORGE E. HART.

Vlfitnesses:

Gno. S. PRINDLE, HENRY O. IIAZARD. 

